feat: add built-in file editor with syntax highlighting

- Add CodeMirror 6 editor with support for 40+ languages
- Add file browser sidebar with directory tree navigation
- Add multi-tab support with dirty state indicators
- Add keyboard shortcuts (Ctrl+E, Ctrl+B, Ctrl+S, Ctrl+W)
- Add editor toggle button to status bar
- Editor uses current session's CWD and requires connection
- Add Tauri commands for file operations (list, read, write)

package.json

@@ -27,6 +27,31 @@
   },
   "license": "MIT",
   "dependencies": {
+    "@codemirror/lang-angular": "^0.1.4",
+    "@codemirror/lang-cpp": "^6.0.3",
+    "@codemirror/lang-css": "^6.3.1",
+    "@codemirror/lang-go": "^6.0.1",
+    "@codemirror/lang-html": "^6.4.11",
+    "@codemirror/lang-java": "^6.0.2",
+    "@codemirror/lang-javascript": "^6.2.4",
+    "@codemirror/lang-json": "^6.0.2",
+    "@codemirror/lang-less": "^6.0.2",
+    "@codemirror/lang-markdown": "^6.5.0",
+    "@codemirror/lang-php": "^6.0.2",
+    "@codemirror/lang-python": "^6.2.1",
+    "@codemirror/lang-rust": "^6.0.2",
+    "@codemirror/lang-sass": "^6.0.2",
+    "@codemirror/lang-sql": "^6.10.0",
+    "@codemirror/lang-vue": "^0.1.3",
+    "@codemirror/lang-wast": "^6.0.2",
+    "@codemirror/lang-xml": "^6.1.0",
+    "@codemirror/lang-yaml": "^6.1.2",
+    "@codemirror/language": "^6.12.1",
+    "@codemirror/legacy-modes": "^6.5.2",
+    "@codemirror/state": "^6.5.4",
+    "@codemirror/theme-one-dark": "^6.1.3",
+    "@codemirror/view": "^6.39.11",
+    "@lezer/highlight": "^1.2.3",
     "@tauri-apps/api": "^2",
     "@tauri-apps/plugin-clipboard-manager": "^2.3.2",
     "@tauri-apps/plugin-dialog": "^2",
@@ -36,6 +61,7 @@
     "@tauri-apps/plugin-os": "^2",
     "@tauri-apps/plugin-shell": "^2.3.4",
     "@tauri-apps/plugin-store": "^2",
+    "codemirror": "^6.0.2",
     "highlight.js": "^11.11.1",
     "marked": "^17.0.1"
   },

pnpm-lock.yaml

@@ -8,6 +8,81 @@ importers:
 
   .:
     dependencies:
+      '@codemirror/lang-angular':
+        specifier: ^0.1.4
+        version: 0.1.4
+      '@codemirror/lang-cpp':
+        specifier: ^6.0.3
+        version: 6.0.3
+      '@codemirror/lang-css':
+        specifier: ^6.3.1
+        version: 6.3.1
+      '@codemirror/lang-go':
+        specifier: ^6.0.1
+        version: 6.0.1
+      '@codemirror/lang-html':
+        specifier: ^6.4.11
+        version: 6.4.11
+      '@codemirror/lang-java':
+        specifier: ^6.0.2
+        version: 6.0.2
+      '@codemirror/lang-javascript':
+        specifier: ^6.2.4
+        version: 6.2.4
+      '@codemirror/lang-json':
+        specifier: ^6.0.2
+        version: 6.0.2
+      '@codemirror/lang-less':
+        specifier: ^6.0.2
+        version: 6.0.2
+      '@codemirror/lang-markdown':
+        specifier: ^6.5.0
+        version: 6.5.0
+      '@codemirror/lang-php':
+        specifier: ^6.0.2
+        version: 6.0.2
+      '@codemirror/lang-python':
+        specifier: ^6.2.1
+        version: 6.2.1
+      '@codemirror/lang-rust':
+        specifier: ^6.0.2
+        version: 6.0.2
+      '@codemirror/lang-sass':
+        specifier: ^6.0.2
+        version: 6.0.2
+      '@codemirror/lang-sql':
+        specifier: ^6.10.0
+        version: 6.10.0
+      '@codemirror/lang-vue':
+        specifier: ^0.1.3
+        version: 0.1.3
+      '@codemirror/lang-wast':
+        specifier: ^6.0.2
+        version: 6.0.2
+      '@codemirror/lang-xml':
+        specifier: ^6.1.0
+        version: 6.1.0
+      '@codemirror/lang-yaml':
+        specifier: ^6.1.2
+        version: 6.1.2
+      '@codemirror/language':
+        specifier: ^6.12.1
+        version: 6.12.1
+      '@codemirror/legacy-modes':
+        specifier: ^6.5.2
+        version: 6.5.2
+      '@codemirror/state':
+        specifier: ^6.5.4
+        version: 6.5.4
+      '@codemirror/theme-one-dark':
+        specifier: ^6.1.3
+        version: 6.1.3
+      '@codemirror/view':
+        specifier: ^6.39.11
+        version: 6.39.11
+      '@lezer/highlight':
+        specifier: ^1.2.3
+        version: 1.2.3
       '@tauri-apps/api':
         specifier: ^2
         version: 2.9.1
@@ -35,6 +110,9 @@ importers:
       '@tauri-apps/plugin-store':
         specifier: ^2
         version: 2.4.2
+      codemirror:
+        specifier: ^6.0.2
+        version: 6.0.2
       highlight.js:
         specifier: ^11.11.1
         version: 11.11.1
@@ -158,6 +236,90 @@ packages:
     resolution: {integrity: sha512-6zABk/ECA/QYSCQ1NGiVwwbQerUCZ+TQbp64Q3AgmfNvurHH0j8TtXa1qbShXA6qqkpAj4V5W8pP6mLe1mcMqA==}
     engines: {node: '>=18'}
 
+  '@codemirror/autocomplete@6.20.0':
+    resolution: {integrity: sha512-bOwvTOIJcG5FVo5gUUupiwYh8MioPLQ4UcqbcRf7UQ98X90tCa9E1kZ3Z7tqwpZxYyOvh1YTYbmZE9RTfTp5hg==}
+
+  '@codemirror/commands@6.10.1':
+    resolution: {integrity: sha512-uWDWFypNdQmz2y1LaNJzK7fL7TYKLeUAU0npEC685OKTF3KcQ2Vu3klIM78D7I6wGhktme0lh3CuQLv0ZCrD9Q==}
+
+  '@codemirror/lang-angular@0.1.4':
+    resolution: {integrity: sha512-oap+gsltb/fzdlTQWD6BFF4bSLKcDnlxDsLdePiJpCVNKWXSTAbiiQeYI3UmES+BLAdkmIC1WjyztC1pi/bX4g==}
+
+  '@codemirror/lang-cpp@6.0.3':
+    resolution: {integrity: sha512-URM26M3vunFFn9/sm6rzqrBzDgfWuDixp85uTY49wKudToc2jTHUrKIGGKs+QWND+YLofNNZpxcNGRynFJfvgA==}
+
+  '@codemirror/lang-css@6.3.1':
+    resolution: {integrity: sha512-kr5fwBGiGtmz6l0LSJIbno9QrifNMUusivHbnA1H6Dmqy4HZFte3UAICix1VuKo0lMPKQr2rqB+0BkKi/S3Ejg==}
+
+  '@codemirror/lang-go@6.0.1':
+    resolution: {integrity: sha512-7fNvbyNylvqCphW9HD6WFnRpcDjr+KXX/FgqXy5H5ZS0eC5edDljukm/yNgYkwTsgp2busdod50AOTIy6Jikfg==}
+
+  '@codemirror/lang-html@6.4.11':
+    resolution: {integrity: sha512-9NsXp7Nwp891pQchI7gPdTwBuSuT3K65NGTHWHNJ55HjYcHLllr0rbIZNdOzas9ztc1EUVBlHou85FFZS4BNnw==}
+
+  '@codemirror/lang-java@6.0.2':
+    resolution: {integrity: sha512-m5Nt1mQ/cznJY7tMfQTJchmrjdjQ71IDs+55d1GAa8DGaB8JXWsVCkVT284C3RTASaY43YknrK2X3hPO/J3MOQ==}
+
+  '@codemirror/lang-javascript@6.2.4':
+    resolution: {integrity: sha512-0WVmhp1QOqZ4Rt6GlVGwKJN3KW7Xh4H2q8ZZNGZaP6lRdxXJzmjm4FqvmOojVj6khWJHIb9sp7U/72W7xQgqAA==}
+
+  '@codemirror/lang-json@6.0.2':
+    resolution: {integrity: sha512-x2OtO+AvwEHrEwR0FyyPtfDUiloG3rnVTSZV1W8UteaLL8/MajQd8DpvUb2YVzC+/T18aSDv0H9mu+xw0EStoQ==}
+
+  '@codemirror/lang-less@6.0.2':
+    resolution: {integrity: sha512-EYdQTG22V+KUUk8Qq582g7FMnCZeEHsyuOJisHRft/mQ+ZSZ2w51NupvDUHiqtsOy7It5cHLPGfHQLpMh9bqpQ==}
+
+  '@codemirror/lang-markdown@6.5.0':
+    resolution: {integrity: sha512-0K40bZ35jpHya6FriukbgaleaqzBLZfOh7HuzqbMxBXkbYMJDxfF39c23xOgxFezR+3G+tR2/Mup+Xk865OMvw==}
+
+  '@codemirror/lang-php@6.0.2':
+    resolution: {integrity: sha512-ZKy2v1n8Fc8oEXj0Th0PUMXzQJ0AIR6TaZU+PbDHExFwdu+guzOA4jmCHS1Nz4vbFezwD7LyBdDnddSJeScMCA==}
+
+  '@codemirror/lang-python@6.2.1':
+    resolution: {integrity: sha512-IRjC8RUBhn9mGR9ywecNhB51yePWCGgvHfY1lWN/Mrp3cKuHr0isDKia+9HnvhiWNnMpbGhWrkhuWOc09exRyw==}
+
+  '@codemirror/lang-rust@6.0.2':
+    resolution: {integrity: sha512-EZaGjCUegtiU7kSMvOfEZpaCReowEf3yNidYu7+vfuGTm9ow4mthAparY5hisJqOHmJowVH3Upu+eJlUji6qqA==}
+
+  '@codemirror/lang-sass@6.0.2':
+    resolution: {integrity: sha512-l/bdzIABvnTo1nzdY6U+kPAC51czYQcOErfzQ9zSm9D8GmNPD0WTW8st/CJwBTPLO8jlrbyvlSEcN20dc4iL0Q==}
+
+  '@codemirror/lang-sql@6.10.0':
+    resolution: {integrity: sha512-6ayPkEd/yRw0XKBx5uAiToSgGECo/GY2NoJIHXIIQh1EVwLuKoU8BP/qK0qH5NLXAbtJRLuT73hx7P9X34iO4w==}
+
+  '@codemirror/lang-vue@0.1.3':
+    resolution: {integrity: sha512-QSKdtYTDRhEHCfo5zOShzxCmqKJvgGrZwDQSdbvCRJ5pRLWBS7pD/8e/tH44aVQT6FKm0t6RVNoSUWHOI5vNug==}
+
+  '@codemirror/lang-wast@6.0.2':
+    resolution: {integrity: sha512-Imi2KTpVGm7TKuUkqyJ5NRmeFWF7aMpNiwHnLQe0x9kmrxElndyH0K6H/gXtWwY6UshMRAhpENsgfpSwsgmC6Q==}
+
+  '@codemirror/lang-xml@6.1.0':
+    resolution: {integrity: sha512-3z0blhicHLfwi2UgkZYRPioSgVTo9PV5GP5ducFH6FaHy0IAJRg+ixj5gTR1gnT/glAIC8xv4w2VL1LoZfs+Jg==}
+
+  '@codemirror/lang-yaml@6.1.2':
+    resolution: {integrity: sha512-dxrfG8w5Ce/QbT7YID7mWZFKhdhsaTNOYjOkSIMt1qmC4VQnXSDSYVHHHn8k6kJUfIhtLo8t1JJgltlxWdsITw==}
+
+  '@codemirror/language@6.12.1':
+    resolution: {integrity: sha512-Fa6xkSiuGKc8XC8Cn96T+TQHYj4ZZ7RdFmXA3i9xe/3hLHfwPZdM+dqfX0Cp0zQklBKhVD8Yzc8LS45rkqcwpQ==}
+
+  '@codemirror/legacy-modes@6.5.2':
+    resolution: {integrity: sha512-/jJbwSTazlQEDOQw2FJ8LEEKVS72pU0lx6oM54kGpL8t/NJ2Jda3CZ4pcltiKTdqYSRk3ug1B3pil1gsjA6+8Q==}
+
+  '@codemirror/lint@6.9.3':
+    resolution: {integrity: sha512-y3YkYhdnhjDBAe0VIA0c4wVoFOvnp8CnAvfLqi0TqotIv92wIlAAP7HELOpLBsKwjAX6W92rSflA6an/2zBvXw==}
+
+  '@codemirror/search@6.6.0':
+    resolution: {integrity: sha512-koFuNXcDvyyotWcgOnZGmY7LZqEOXZaaxD/j6n18TCLx2/9HieZJ5H6hs1g8FiRxBD0DNfs0nXn17g872RmYdw==}
+
+  '@codemirror/state@6.5.4':
+    resolution: {integrity: sha512-8y7xqG/hpB53l25CIoit9/ngxdfoG+fx+V3SHBrinnhOtLvKHRyAJJuHzkWrR4YXXLX8eXBsejgAAxHUOdW1yw==}
+
+  '@codemirror/theme-one-dark@6.1.3':
+    resolution: {integrity: sha512-NzBdIvEJmx6fjeremiGp3t/okrLPYT0d9orIc7AFun8oZcRk58aejkqhv6spnz4MLAevrKNPMQYXEWMg4s+sKA==}
+
+  '@codemirror/view@6.39.11':
+    resolution: {integrity: sha512-bWdeR8gWM87l4DB/kYSF9A+dVackzDb/V56Tq7QVrQ7rn86W0rgZFtlL3g3pem6AeGcb9NQNoy3ao4WpW4h5tQ==}
+
   '@csstools/color-helpers@5.1.0':
     resolution: {integrity: sha512-S11EXWJyy0Mz5SYvRmY8nJYTFFd1LCNV+7cXyAgQtOOuzb4EsgfqDufL+9esx72/eLhsRdGZwaldu/h+E4t4BA==}
     engines: {node: '>=18'}
@@ -425,6 +587,60 @@ packages:
   '@jridgewell/trace-mapping@0.3.31':
     resolution: {integrity: sha512-zzNR+SdQSDJzc8joaeP8QQoCQr8NuYx2dIIytl1QeBEZHJ9uW6hebsrYgbz8hJwUQao3TWCMtmfV8Nu1twOLAw==}
 
+  '@lezer/common@1.5.0':
+    resolution: {integrity: sha512-PNGcolp9hr4PJdXR4ix7XtixDrClScvtSCYW3rQG106oVMOOI+jFb+0+J3mbeL/53g1Zd6s0kJzaw6Ri68GmAA==}
+
+  '@lezer/cpp@1.1.5':
+    resolution: {integrity: sha512-DIhSXmYtJKLehrjzDFN+2cPt547ySQ41nA8yqcDf/GxMc+YM736xqltFkvADL2M0VebU5I+3+4ks2Vv+Kyq3Aw==}
+
+  '@lezer/css@1.3.0':
+    resolution: {integrity: sha512-pBL7hup88KbI7hXnZV3PQsn43DHy6TWyzuyk2AO9UyoXcDltvIdqWKE1dLL/45JVZ+YZkHe1WVHqO6wugZZWcw==}
+
+  '@lezer/go@1.0.1':
+    resolution: {integrity: sha512-xToRsYxwsgJNHTgNdStpcvmbVuKxTapV0dM0wey1geMMRc9aggoVyKgzYp41D2/vVOx+Ii4hmE206kvxIXBVXQ==}
+
+  '@lezer/highlight@1.2.3':
+    resolution: {integrity: sha512-qXdH7UqTvGfdVBINrgKhDsVTJTxactNNxLk7+UMwZhU13lMHaOBlJe9Vqp907ya56Y3+ed2tlqzys7jDkTmW0g==}
+
+  '@lezer/html@1.3.13':
+    resolution: {integrity: sha512-oI7n6NJml729m7pjm9lvLvmXbdoMoi2f+1pwSDJkl9d68zGr7a9Btz8NdHTGQZtW2DA25ybeuv/SyDb9D5tseg==}
+
+  '@lezer/java@1.1.3':
+    resolution: {integrity: sha512-yHquUfujwg6Yu4Fd1GNHCvidIvJwi/1Xu2DaKl/pfWIA2c1oXkVvawH3NyXhCaFx4OdlYBVX5wvz2f7Aoa/4Xw==}
+
+  '@lezer/javascript@1.5.4':
+    resolution: {integrity: sha512-vvYx3MhWqeZtGPwDStM2dwgljd5smolYD2lR2UyFcHfxbBQebqx8yjmFmxtJ/E6nN6u1D9srOiVWm3Rb4tmcUA==}
+
+  '@lezer/json@1.0.3':
+    resolution: {integrity: sha512-BP9KzdF9Y35PDpv04r0VeSTKDeox5vVr3efE7eBbx3r4s3oNLfunchejZhjArmeieBH+nVOpgIiBJpEAv8ilqQ==}
+
+  '@lezer/lr@1.4.8':
+    resolution: {integrity: sha512-bPWa0Pgx69ylNlMlPvBPryqeLYQjyJjqPx+Aupm5zydLIF3NE+6MMLT8Yi23Bd9cif9VS00aUebn+6fDIGBcDA==}
+
+  '@lezer/markdown@1.6.3':
+    resolution: {integrity: sha512-jpGm5Ps+XErS+xA4urw7ogEGkeZOahVQF21Z6oECF0sj+2liwZopd2+I8uH5I/vZsRuuze3OxBREIANLf6KKUw==}
+
+  '@lezer/php@1.0.5':
+    resolution: {integrity: sha512-W7asp9DhM6q0W6DYNwIkLSKOvxlXRrif+UXBMxzsJUuqmhE7oVU+gS3THO4S/Puh7Xzgm858UNaFi6dxTP8dJA==}
+
+  '@lezer/python@1.1.18':
+    resolution: {integrity: sha512-31FiUrU7z9+d/ElGQLJFXl+dKOdx0jALlP3KEOsGTex8mvj+SoE1FgItcHWK/axkxCHGUSpqIHt6JAWfWu9Rhg==}
+
+  '@lezer/rust@1.0.2':
+    resolution: {integrity: sha512-Lz5sIPBdF2FUXcWeCu1//ojFAZqzTQNRga0aYv6dYXqJqPfMdCAI0NzajWUd4Xijj1IKJLtjoXRPMvTKWBcqKg==}
+
+  '@lezer/sass@1.1.0':
+    resolution: {integrity: sha512-3mMGdCTUZ/84ArHOuXWQr37pnf7f+Nw9ycPUeKX+wu19b7pSMcZGLbaXwvD2APMBDOGxPmpK/O6S1v1EvLoqgQ==}
+
+  '@lezer/xml@1.0.6':
+    resolution: {integrity: sha512-CdDwirL0OEaStFue/66ZmFSeppuL6Dwjlk8qk153mSQwiSH/Dlri4GNymrNWnUmPl2Um7QfV1FO9KFUyX3Twww==}
+
+  '@lezer/yaml@1.0.3':
+    resolution: {integrity: sha512-GuBLekbw9jDBDhGur82nuwkxKQ+a3W5H0GfaAthDXcAu+XdpS43VlnxA9E9hllkpSP5ellRDKjLLj7Lu9Wr6xA==}
+
+  '@marijn/find-cluster-break@1.0.2':
+    resolution: {integrity: sha512-l0h88YhZFyKdXIFNfSWpyjStDjGHwZ/U7iobcK1cQQD8sejsONdQtTVU+1wVN1PBw40PiiHB1vA5S7VTfQiP9g==}
+
   '@polka/url@1.0.0-next.29':
     resolution: {integrity: sha512-wwQAWhWSuHaag8c4q/KN/vCoeOJYshAIvMQwD4GpSb3OiZklFfvAgmj0VCBBImRpuF/aFgIRzllXlVX93Jevww==}
 
@@ -1015,6 +1231,9 @@ packages:
     resolution: {integrity: sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA==}
     engines: {node: '>=6'}
 
+  codemirror@6.0.2:
+    resolution: {integrity: sha512-VhydHotNW5w1UGK0Qj96BwSk/Zqbp9WbnyK2W/eVMv4QyF41INRGpjUhFJY7/uDNuudSc33a/PKr4iDqRduvHw==}
+
   color-convert@2.0.1:
     resolution: {integrity: sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==}
     engines: {node: '>=7.0.0'}
@@ -1029,6 +1248,9 @@ packages:
     resolution: {integrity: sha512-U71cyTamuh1CRNCfpGY6to28lxvNwPG4Guz/EVjgf3Jmzv0vlDp1atT9eS5dDjMYHucpHbWns6Lwf3BKz6svdw==}
     engines: {node: '>= 0.6'}
 
+  crelt@1.0.6:
+    resolution: {integrity: sha512-VQ2MBenTq1fWZUH9DJNGti7kKv6EeAuYr3cLwxUWhIu1baTaXh4Ib5W2CqHVqib4/MqbYGJqiL3Zb8GJZr3l4g==}
+
   cross-spawn@7.0.6:
     resolution: {integrity: sha512-uV2QOWP2nWzsy2aMp8aRibhi9dlzF5Hgh5SHaB9OiTGEyDTiJJyx0uy51QXdyWbtAHNua4XJzUKca3OzKUd3vA==}
     engines: {node: '>= 8'}
@@ -1663,6 +1885,9 @@ packages:
     resolution: {integrity: sha512-6fPc+R4ihwqP6N/aIv2f1gMH8lOVtWQHoqC4yK6oSDVVocumAsfCqjkXnqiYMhmMwS/mEHLp7Vehlt3ql6lEig==}
     engines: {node: '>=8'}
 
+  style-mod@4.1.3:
+    resolution: {integrity: sha512-i/n8VsZydrugj3Iuzll8+x/00GH2vnYsk1eomD8QiRrSAeW6ItbCQDtfXCeJHd0iwiNagqjQkvpvREEPtW3IoQ==}
+
   supports-color@7.2.0:
     resolution: {integrity: sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==}
     engines: {node: '>=8'}
@@ -1842,6 +2067,9 @@ packages:
       jsdom:
         optional: true
 
+  w3c-keyname@2.2.8:
+    resolution: {integrity: sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ==}
+
   w3c-xmlserializer@5.0.0:
     resolution: {integrity: sha512-o8qghlI8NZHU1lLPrpi2+Uq7abh4GGPpYANlalzWxyWteJOCsr/P+oPBA49TOLu5FTZO4d3F9MnWJfiMo4BkmA==}
     engines: {node: '>=18'}
@@ -1949,6 +2177,216 @@ snapshots:
 
   '@bcoe/v8-coverage@1.0.2': {}
 
+  '@codemirror/autocomplete@6.20.0':
+    dependencies:
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@codemirror/view': 6.39.11
+      '@lezer/common': 1.5.0
+
+  '@codemirror/commands@6.10.1':
+    dependencies:
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@codemirror/view': 6.39.11
+      '@lezer/common': 1.5.0
+
+  '@codemirror/lang-angular@0.1.4':
+    dependencies:
+      '@codemirror/lang-html': 6.4.11
+      '@codemirror/lang-javascript': 6.2.4
+      '@codemirror/language': 6.12.1
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@codemirror/lang-cpp@6.0.3':
+    dependencies:
+      '@codemirror/language': 6.12.1
+      '@lezer/cpp': 1.1.5
+
+  '@codemirror/lang-css@6.3.1':
+    dependencies:
+      '@codemirror/autocomplete': 6.20.0
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@lezer/common': 1.5.0
+      '@lezer/css': 1.3.0
+
+  '@codemirror/lang-go@6.0.1':
+    dependencies:
+      '@codemirror/autocomplete': 6.20.0
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@lezer/common': 1.5.0
+      '@lezer/go': 1.0.1
+
+  '@codemirror/lang-html@6.4.11':
+    dependencies:
+      '@codemirror/autocomplete': 6.20.0
+      '@codemirror/lang-css': 6.3.1
+      '@codemirror/lang-javascript': 6.2.4
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@codemirror/view': 6.39.11
+      '@lezer/common': 1.5.0
+      '@lezer/css': 1.3.0
+      '@lezer/html': 1.3.13
+
+  '@codemirror/lang-java@6.0.2':
+    dependencies:
+      '@codemirror/language': 6.12.1
+      '@lezer/java': 1.1.3
+
+  '@codemirror/lang-javascript@6.2.4':
+    dependencies:
+      '@codemirror/autocomplete': 6.20.0
+      '@codemirror/language': 6.12.1
+      '@codemirror/lint': 6.9.3
+      '@codemirror/state': 6.5.4
+      '@codemirror/view': 6.39.11
+      '@lezer/common': 1.5.0
+      '@lezer/javascript': 1.5.4
+
+  '@codemirror/lang-json@6.0.2':
+    dependencies:
+      '@codemirror/language': 6.12.1
+      '@lezer/json': 1.0.3
+
+  '@codemirror/lang-less@6.0.2':
+    dependencies:
+      '@codemirror/lang-css': 6.3.1
+      '@codemirror/language': 6.12.1
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@codemirror/lang-markdown@6.5.0':
+    dependencies:
+      '@codemirror/autocomplete': 6.20.0
+      '@codemirror/lang-html': 6.4.11
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@codemirror/view': 6.39.11
+      '@lezer/common': 1.5.0
+      '@lezer/markdown': 1.6.3
+
+  '@codemirror/lang-php@6.0.2':
+    dependencies:
+      '@codemirror/lang-html': 6.4.11
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@lezer/common': 1.5.0
+      '@lezer/php': 1.0.5
+
+  '@codemirror/lang-python@6.2.1':
+    dependencies:
+      '@codemirror/autocomplete': 6.20.0
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@lezer/common': 1.5.0
+      '@lezer/python': 1.1.18
+
+  '@codemirror/lang-rust@6.0.2':
+    dependencies:
+      '@codemirror/language': 6.12.1
+      '@lezer/rust': 1.0.2
+
+  '@codemirror/lang-sass@6.0.2':
+    dependencies:
+      '@codemirror/lang-css': 6.3.1
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@lezer/common': 1.5.0
+      '@lezer/sass': 1.1.0
+
+  '@codemirror/lang-sql@6.10.0':
+    dependencies:
+      '@codemirror/autocomplete': 6.20.0
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@codemirror/lang-vue@0.1.3':
+    dependencies:
+      '@codemirror/lang-html': 6.4.11
+      '@codemirror/lang-javascript': 6.2.4
+      '@codemirror/language': 6.12.1
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@codemirror/lang-wast@6.0.2':
+    dependencies:
+      '@codemirror/language': 6.12.1
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@codemirror/lang-xml@6.1.0':
+    dependencies:
+      '@codemirror/autocomplete': 6.20.0
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@codemirror/view': 6.39.11
+      '@lezer/common': 1.5.0
+      '@lezer/xml': 1.0.6
+
+  '@codemirror/lang-yaml@6.1.2':
+    dependencies:
+      '@codemirror/autocomplete': 6.20.0
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+      '@lezer/yaml': 1.0.3
+
+  '@codemirror/language@6.12.1':
+    dependencies:
+      '@codemirror/state': 6.5.4
+      '@codemirror/view': 6.39.11
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+      style-mod: 4.1.3
+
+  '@codemirror/legacy-modes@6.5.2':
+    dependencies:
+      '@codemirror/language': 6.12.1
+
+  '@codemirror/lint@6.9.3':
+    dependencies:
+      '@codemirror/state': 6.5.4
+      '@codemirror/view': 6.39.11
+      crelt: 1.0.6
+
+  '@codemirror/search@6.6.0':
+    dependencies:
+      '@codemirror/state': 6.5.4
+      '@codemirror/view': 6.39.11
+      crelt: 1.0.6
+
+  '@codemirror/state@6.5.4':
+    dependencies:
+      '@marijn/find-cluster-break': 1.0.2
+
+  '@codemirror/theme-one-dark@6.1.3':
+    dependencies:
+      '@codemirror/language': 6.12.1
+      '@codemirror/state': 6.5.4
+      '@codemirror/view': 6.39.11
+      '@lezer/highlight': 1.2.3
+
+  '@codemirror/view@6.39.11':
+    dependencies:
+      '@codemirror/state': 6.5.4
+      crelt: 1.0.6
+      style-mod: 4.1.3
+      w3c-keyname: 2.2.8
+
   '@csstools/color-helpers@5.1.0': {}
 
   '@csstools/css-calc@2.1.4(@csstools/css-parser-algorithms@3.0.5(@csstools/css-tokenizer@3.0.4))(@csstools/css-tokenizer@3.0.4)':
@@ -2127,6 +2565,101 @@ snapshots:
       '@jridgewell/resolve-uri': 3.1.2
       '@jridgewell/sourcemap-codec': 1.5.5
 
+  '@lezer/common@1.5.0': {}
+
+  '@lezer/cpp@1.1.5':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/css@1.3.0':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/go@1.0.1':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/highlight@1.2.3':
+    dependencies:
+      '@lezer/common': 1.5.0
+
+  '@lezer/html@1.3.13':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/java@1.1.3':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/javascript@1.5.4':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/json@1.0.3':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/lr@1.4.8':
+    dependencies:
+      '@lezer/common': 1.5.0
+
+  '@lezer/markdown@1.6.3':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+
+  '@lezer/php@1.0.5':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/python@1.1.18':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/rust@1.0.2':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/sass@1.1.0':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/xml@1.0.6':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@lezer/yaml@1.0.3':
+    dependencies:
+      '@lezer/common': 1.5.0
+      '@lezer/highlight': 1.2.3
+      '@lezer/lr': 1.4.8
+
+  '@marijn/find-cluster-break@1.0.2': {}
+
   '@polka/url@1.0.0-next.29': {}
 
   '@rollup/rollup-android-arm-eabi@4.55.1':
@@ -2678,6 +3211,16 @@ snapshots:
 
   clsx@2.1.1: {}
 
+  codemirror@6.0.2:
+    dependencies:
+      '@codemirror/autocomplete': 6.20.0
+      '@codemirror/commands': 6.10.1
+      '@codemirror/language': 6.12.1
+      '@codemirror/lint': 6.9.3
+      '@codemirror/search': 6.6.0
+      '@codemirror/state': 6.5.4
+      '@codemirror/view': 6.39.11
+
   color-convert@2.0.1:
     dependencies:
       color-name: 1.1.4
@@ -2688,6 +3231,8 @@ snapshots:
 
   cookie@0.6.0: {}
 
+  crelt@1.0.6: {}
+
   cross-spawn@7.0.6:
     dependencies:
       path-key: 3.1.1
@@ -3304,6 +3849,8 @@ snapshots:
 
   strip-json-comments@3.1.1: {}
 
+  style-mod@4.1.3: {}
+
   supports-color@7.2.0:
     dependencies:
       has-flag: 4.0.0
@@ -3463,6 +4010,8 @@ snapshots:
       - tsx
       - yaml
 
+  w3c-keyname@2.2.8: {}
+
   w3c-xmlserializer@5.0.0:
     dependencies:
       xml-name-validator: 5.0.0

src-tauri/src/commands.rs

@@ -394,6 +394,75 @@ pub async fn get_file_size(file_path: String) -> Result<u64, String> {
     Ok(metadata.len())
 }
 
+// ==================== Editor File Operations ====================
+
+#[derive(Debug, Clone, serde::Serialize)]
+pub struct FileEntry {
+    pub name: String,
+    pub path: String,
+    #[serde(rename = "isDirectory")]
+    pub is_directory: bool,
+}
+
+#[tauri::command]
+pub async fn list_directory(path: String) -> Result<Vec<FileEntry>, String> {
+    use std::fs;
+    use std::path::Path;
+
+    let dir_path = Path::new(&path);
+
+    if !dir_path.exists() {
+        return Err(format!("Directory does not exist: {}", path));
+    }
+
+    if !dir_path.is_dir() {
+        return Err(format!("Path is not a directory: {}", path));
+    }
+
+    let entries = fs::read_dir(dir_path)
+        .map_err(|e| format!("Failed to read directory: {}", e))?;
+
+    let mut file_entries = Vec::new();
+
+    for entry in entries {
+        let entry = entry.map_err(|e| format!("Failed to read entry: {}", e))?;
+        let path = entry.path();
+        let name = entry
+            .file_name()
+            .to_string_lossy()
+            .to_string();
+
+        // Skip hidden files by default (can be made configurable later)
+        if name.starts_with('.') {
+            continue;
+        }
+
+        file_entries.push(FileEntry {
+            name,
+            path: path.to_string_lossy().to_string(),
+            is_directory: path.is_dir(),
+        });
+    }
+
+    Ok(file_entries)
+}
+
+#[tauri::command]
+pub async fn read_file_content(path: String) -> Result<String, String> {
+    use std::fs;
+
+    fs::read_to_string(&path)
+        .map_err(|e| format!("Failed to read file: {}", e))
+}
+
+#[tauri::command]
+pub async fn write_file_content(path: String, content: String) -> Result<(), String> {
+    use std::fs;
+
+    fs::write(&path, content)
+        .map_err(|e| format!("Failed to write file: {}", e))
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

src-tauri/src/lib.rs

@@ -151,6 +151,9 @@ pub fn run() {
             search_clipboard_entries,
             get_clipboard_languages,
             update_clipboard_language,
+            list_directory,
+            read_file_content,
+            write_file_content,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");

src/lib/components/KeyboardShortcutsModal.svelte

@@ -12,6 +12,7 @@
         { keys: ["Escape"], description: "Close modals and panels" },
         { keys: ["Ctrl", "L"], description: "Clear the terminal" },
         { keys: ["Ctrl", ","], description: "Open settings" },
+        { keys: ["Ctrl", "E"], description: "Toggle file editor" },
         { keys: ["Ctrl", "Shift", "M"], description: "Toggle compact mode" },
         { keys: ["Ctrl", "Shift", "S"], description: "Toggle streamer mode" },
       ],
@@ -26,6 +27,15 @@
         { keys: ["↓"], description: "Next input from history" },
       ],
     },
+    {
+      category: "File Editor",
+      items: [
+        { keys: ["Ctrl", "E"], description: "Toggle editor view" },
+        { keys: ["Ctrl", "B"], description: "Toggle file browser" },
+        { keys: ["Ctrl", "S"], description: "Save current file" },
+        { keys: ["Ctrl", "W"], description: "Close current tab" },
+      ],
+    },
     {
       category: "Slash Commands",
       items: [

src/lib/components/StatusBar.svelte

@@ -13,6 +13,7 @@
   import { get } from "svelte/store";
   import { claudeStore } from "$lib/stores/claude";
   import { configStore, type HikariConfig, isStreamerMode } from "$lib/stores/config";
+  import { editorStore } from "$lib/stores/editor";
   import type { ConnectionStatus } from "$lib/types/messages";
   import { onMount } from "svelte";
   import StatsDisplay from "./StatsDisplay.svelte";
@@ -80,6 +81,15 @@
     streamerModeActive = value;
   });
 
+  let editorVisible = $state(false);
+  editorStore.isEditorVisible.subscribe((value) => {
+    editorVisible = value;
+  });
+
+  function toggleEditor() {
+    editorStore.toggleEditor();
+  }
+
   onMount(async () => {
     appVersion = await getVersion();
   });
@@ -307,6 +317,25 @@
         />
       </svg>
     </button>
+    <button
+      onclick={toggleEditor}
+      disabled={connectionStatus !== "connected"}
+      class="p-1 text-gray-500 icon-trans-hover {editorVisible
+        ? 'text-[var(--trans-pink)]'
+        : ''} disabled:opacity-40 disabled:cursor-not-allowed"
+      title={connectionStatus === "connected"
+        ? "File Editor (Ctrl+E)"
+        : "Connect to enable file editor"}
+    >
+      <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+        <path
+          stroke-linecap="round"
+          stroke-linejoin="round"
+          stroke-width="2"
+          d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"
+        />
+      </svg>
+    </button>
     <button
       onclick={() => (showStats = !showStats)}
       class="p-1 text-gray-500 icon-trans-hover {showStats ? 'text-[var(--trans-pink)]' : ''}"

src/lib/components/editor/CodeEditor.svelte

@@ -0,0 +1,179 @@
+<script lang="ts">
+  import { onMount, onDestroy } from "svelte";
+  import { EditorView, basicSetup } from "codemirror";
+  import { EditorState } from "@codemirror/state";
+  import { keymap } from "@codemirror/view";
+  import { oneDark } from "@codemirror/theme-one-dark";
+  import { javascript } from "@codemirror/lang-javascript";
+  import { python } from "@codemirror/lang-python";
+  import { rust } from "@codemirror/lang-rust";
+  import { html } from "@codemirror/lang-html";
+  import { css } from "@codemirror/lang-css";
+  import { json } from "@codemirror/lang-json";
+  import { markdown } from "@codemirror/lang-markdown";
+  import { xml } from "@codemirror/lang-xml";
+  import { sql } from "@codemirror/lang-sql";
+  import { java } from "@codemirror/lang-java";
+  import { cpp } from "@codemirror/lang-cpp";
+  import { php } from "@codemirror/lang-php";
+  import { go } from "@codemirror/lang-go";
+  import { yaml } from "@codemirror/lang-yaml";
+  import { sass } from "@codemirror/lang-sass";
+  import { less } from "@codemirror/lang-less";
+  import { vue } from "@codemirror/lang-vue";
+  import { angular } from "@codemirror/lang-angular";
+  import { wast } from "@codemirror/lang-wast";
+  import { StreamLanguage } from "@codemirror/language";
+  import { shell } from "@codemirror/legacy-modes/mode/shell";
+  import { ruby } from "@codemirror/legacy-modes/mode/ruby";
+  import { swift } from "@codemirror/legacy-modes/mode/swift";
+  import { lua } from "@codemirror/legacy-modes/mode/lua";
+  import { r } from "@codemirror/legacy-modes/mode/r";
+  import { toml } from "@codemirror/legacy-modes/mode/toml";
+  import { dockerFile } from "@codemirror/legacy-modes/mode/dockerfile";
+  import { powerShell } from "@codemirror/legacy-modes/mode/powershell";
+  import { editorStore } from "$lib/stores/editor";
+  import type { EditorTab } from "$lib/types/editor";
+  import type { Extension } from "@codemirror/state";
+
+  export let tab: EditorTab;
+
+  let editorContainer: HTMLDivElement;
+  let view: EditorView | null = null;
+
+  function getLanguageExtension(language: string): Extension {
+    const languageMap: Record<string, () => Extension> = {
+      javascript: () => javascript({ jsx: true, typescript: false }),
+      typescript: () => javascript({ jsx: true, typescript: true }),
+      python: () => python(),
+      rust: () => rust(),
+      html: () => html(),
+      css: () => css(),
+      json: () => json(),
+      markdown: () => markdown(),
+      xml: () => xml(),
+      sql: () => sql(),
+      java: () => java(),
+      c: () => cpp(),
+      cpp: () => cpp(),
+      csharp: () => cpp(),
+      php: () => php(),
+      go: () => go(),
+      yaml: () => yaml(),
+      scss: () => sass(),
+      sass: () => sass(),
+      less: () => less(),
+      vue: () => vue(),
+      angular: () => angular(),
+      wasm: () => wast(),
+      shell: () => StreamLanguage.define(shell),
+      ruby: () => StreamLanguage.define(ruby),
+      swift: () => StreamLanguage.define(swift),
+      lua: () => StreamLanguage.define(lua),
+      r: () => StreamLanguage.define(r),
+      toml: () => StreamLanguage.define(toml),
+      dockerfile: () => StreamLanguage.define(dockerFile),
+      powershell: () => StreamLanguage.define(powerShell),
+      svelte: () => html(),
+    };
+
+    const getExtension = languageMap[language];
+    return getExtension ? getExtension() : [];
+  }
+
+  function createEditor() {
+    if (!editorContainer) return;
+
+    const saveKeymap = keymap.of([
+      {
+        key: "Mod-s",
+        run: () => {
+          editorStore.saveFile(tab.id);
+          return true;
+        },
+      },
+    ]);
+
+    const updateListener = EditorView.updateListener.of((update) => {
+      if (update.docChanged) {
+        const content = update.state.doc.toString();
+        editorStore.updateTabContent(tab.id, content);
+      }
+    });
+
+    const state = EditorState.create({
+      doc: tab.content,
+      extensions: [
+        basicSetup,
+        oneDark,
+        getLanguageExtension(tab.language),
+        saveKeymap,
+        updateListener,
+        EditorView.theme({
+          "&": {
+            height: "100%",
+            fontSize: "14px",
+          },
+          ".cm-scroller": {
+            overflow: "auto",
+          },
+          ".cm-content": {
+            fontFamily: "'JetBrains Mono', 'Fira Code', 'Consolas', monospace",
+          },
+          ".cm-gutters": {
+            backgroundColor: "var(--bg-secondary)",
+            borderRight: "1px solid var(--border-color)",
+          },
+        }),
+      ],
+    });
+
+    view = new EditorView({
+      state,
+      parent: editorContainer,
+    });
+  }
+
+  function destroyEditor() {
+    if (view) {
+      view.destroy();
+      view = null;
+    }
+  }
+
+  onMount(() => {
+    createEditor();
+  });
+
+  onDestroy(() => {
+    destroyEditor();
+  });
+
+  $: if (view && tab.content !== view.state.doc.toString()) {
+    view.dispatch({
+      changes: {
+        from: 0,
+        to: view.state.doc.length,
+        insert: tab.content,
+      },
+    });
+  }
+</script>
+
+<div class="code-editor" bind:this={editorContainer}></div>
+
+<style>
+  .code-editor {
+    flex: 1;
+    overflow: hidden;
+    background-color: var(--bg-terminal);
+  }
+
+  .code-editor :global(.cm-editor) {
+    height: 100%;
+  }
+
+  .code-editor :global(.cm-focused) {
+    outline: none;
+  }
+</style>

src/lib/components/editor/EditorPanel.svelte

@@ -0,0 +1,253 @@
+<script lang="ts">
+  import { editorStore } from "$lib/stores/editor";
+  import FileBrowser from "./FileBrowser.svelte";
+  import EditorTabs from "./EditorTabs.svelte";
+  import CodeEditor from "./CodeEditor.svelte";
+
+  const isFileBrowserOpen = editorStore.isFileBrowserOpen;
+  const activeTab = editorStore.activeTab;
+  const saveError = editorStore.saveError;
+
+  function toggleFileBrowser() {
+    editorStore.toggleFileBrowser();
+  }
+
+  async function handleSave() {
+    try {
+      await editorStore.saveFile();
+    } catch {
+      // Error is already set in the store
+    }
+  }
+</script>
+
+<div class="editor-panel">
+  <div class="toolbar">
+    <button
+      class="toolbar-button"
+      class:active={$isFileBrowserOpen}
+      on:click={toggleFileBrowser}
+      title="Toggle file browser (Ctrl+B)"
+    >
+      <svg
+        width="16"
+        height="16"
+        viewBox="0 0 24 24"
+        fill="none"
+        stroke="currentColor"
+        stroke-width="2"
+      >
+        <path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z" />
+      </svg>
+    </button>
+
+    <div class="toolbar-spacer"></div>
+
+    {#if $activeTab}
+      <button class="toolbar-button" on:click={handleSave} title="Save (Ctrl+S)">
+        <svg
+          width="16"
+          height="16"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          stroke-width="2"
+        >
+          <path d="M19 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11l5 5v11a2 2 0 0 1-2 2z" />
+          <polyline points="17 21 17 13 7 13 7 21" />
+          <polyline points="7 3 7 8 15 8" />
+        </svg>
+      </button>
+    {/if}
+  </div>
+
+  {#if $saveError}
+    <div class="error-banner">
+      <span>{$saveError}</span>
+      <button
+        class="dismiss-button"
+        on:click={() => {}}
+        title="Dismiss error"
+        aria-label="Dismiss error"
+      >
+        <svg
+          width="14"
+          height="14"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          stroke-width="2"
+        >
+          <path d="M18 6L6 18M6 6l12 12" />
+        </svg>
+      </button>
+    </div>
+  {/if}
+
+  <div class="editor-content">
+    {#if $isFileBrowserOpen}
+      <div class="file-browser-container">
+        <FileBrowser />
+      </div>
+    {/if}
+
+    <div class="editor-main">
+      <EditorTabs />
+
+      <div class="editor-area">
+        {#if $activeTab}
+          {#key $activeTab.id}
+            <CodeEditor tab={$activeTab} />
+          {/key}
+        {:else}
+          <div class="no-file">
+            <div class="no-file-content">
+              <svg
+                width="48"
+                height="48"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                stroke-width="1"
+              >
+                <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z" />
+                <polyline points="14 2 14 8 20 8" />
+              </svg>
+              <p>Select a file to edit</p>
+              <p class="hint">Use the file browser on the left or press Ctrl+B to toggle it</p>
+            </div>
+          </div>
+        {/if}
+      </div>
+    </div>
+  </div>
+</div>
+
+<style>
+  .editor-panel {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+    background-color: var(--bg-primary);
+  }
+
+  .toolbar {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+    padding: 4px 8px;
+    background-color: var(--bg-secondary);
+    border-bottom: 1px solid var(--border-color);
+  }
+
+  .toolbar-button {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    padding: 6px;
+    background: transparent;
+    border: none;
+    color: var(--text-secondary);
+    cursor: pointer;
+    border-radius: 4px;
+    transition: all 0.15s ease;
+  }
+
+  .toolbar-button:hover {
+    background-color: var(--bg-primary);
+    color: var(--text-primary);
+  }
+
+  .toolbar-button.active {
+    background-color: var(--bg-primary);
+    color: var(--accent-primary);
+  }
+
+  .toolbar-spacer {
+    flex: 1;
+  }
+
+  .error-banner {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 8px 12px;
+    background-color: #ff000022;
+    border-bottom: 1px solid #ff0000;
+    color: #ff6b6b;
+    font-size: 13px;
+  }
+
+  .dismiss-button {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    padding: 4px;
+    background: transparent;
+    border: none;
+    color: #ff6b6b;
+    cursor: pointer;
+    border-radius: 4px;
+  }
+
+  .dismiss-button:hover {
+    background-color: #ff000033;
+  }
+
+  .editor-content {
+    display: flex;
+    flex: 1;
+    overflow: hidden;
+  }
+
+  .file-browser-container {
+    width: 250px;
+    min-width: 150px;
+    max-width: 400px;
+    flex-shrink: 0;
+    overflow: hidden;
+  }
+
+  .editor-main {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+  }
+
+  .editor-area {
+    flex: 1;
+    overflow: hidden;
+    display: flex;
+  }
+
+  .no-file {
+    flex: 1;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    background-color: var(--bg-terminal);
+  }
+
+  .no-file-content {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 12px;
+    color: var(--text-secondary);
+    text-align: center;
+  }
+
+  .no-file-content svg {
+    opacity: 0.5;
+  }
+
+  .no-file-content p {
+    margin: 0;
+  }
+
+  .no-file-content .hint {
+    font-size: 12px;
+    opacity: 0.7;
+  }
+</style>

src/lib/components/editor/EditorTabs.svelte

@@ -0,0 +1,170 @@
+<script lang="ts">
+  import { editorStore } from "$lib/stores/editor";
+
+  const tabs = editorStore.tabs;
+  const activeTabId = editorStore.activeTabId;
+
+  function handleTabClick(tabId: string) {
+    editorStore.setActiveTab(tabId);
+  }
+
+  function handleCloseTab(event: MouseEvent, tabId: string) {
+    event.stopPropagation();
+    editorStore.closeTab(tabId);
+  }
+
+  function handleKeydown(event: KeyboardEvent, tabId: string) {
+    if (event.key === "Enter" || event.key === " ") {
+      event.preventDefault();
+      editorStore.setActiveTab(tabId);
+    }
+  }
+
+  function handleCloseKeydown(event: KeyboardEvent, tabId: string) {
+    if (event.key === "Enter" || event.key === " ") {
+      event.preventDefault();
+      event.stopPropagation();
+      editorStore.closeTab(tabId);
+    }
+  }
+</script>
+
+<div class="editor-tabs">
+  {#if $tabs.length === 0}
+    <div class="no-tabs">No files open</div>
+  {:else}
+    <div class="tabs-container" role="tablist">
+      {#each $tabs as tab (tab.id)}
+        <div
+          class="tab"
+          class:active={tab.id === $activeTabId}
+          class:dirty={tab.isDirty}
+          role="tab"
+          tabindex="0"
+          aria-selected={tab.id === $activeTabId}
+          on:click={() => handleTabClick(tab.id)}
+          on:keydown={(e) => handleKeydown(e, tab.id)}
+          title={tab.filePath}
+        >
+          <span class="tab-name">
+            {tab.fileName}
+            {#if tab.isDirty}
+              <span class="dirty-indicator">*</span>
+            {/if}
+          </span>
+          <button
+            class="close-button"
+            on:click={(e) => handleCloseTab(e, tab.id)}
+            on:keydown={(e) => handleCloseKeydown(e, tab.id)}
+            title="Close tab"
+            aria-label="Close {tab.fileName}"
+          >
+            <svg
+              width="12"
+              height="12"
+              viewBox="0 0 24 24"
+              fill="none"
+              stroke="currentColor"
+              stroke-width="2"
+            >
+              <path d="M18 6L6 18M6 6l12 12" />
+            </svg>
+          </button>
+        </div>
+      {/each}
+    </div>
+  {/if}
+</div>
+
+<style>
+  .editor-tabs {
+    display: flex;
+    align-items: center;
+    background-color: var(--bg-secondary);
+    border-bottom: 1px solid var(--border-color);
+    min-height: 36px;
+  }
+
+  .no-tabs {
+    padding: 8px 12px;
+    color: var(--text-secondary);
+    font-size: 13px;
+  }
+
+  .tabs-container {
+    display: flex;
+    overflow-x: auto;
+    scrollbar-width: thin;
+  }
+
+  .tab {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 8px 12px;
+    background: transparent;
+    border: none;
+    border-right: 1px solid var(--border-color);
+    color: var(--text-secondary);
+    font-size: 13px;
+    cursor: pointer;
+    white-space: nowrap;
+    transition: all 0.15s ease;
+  }
+
+  .tab:hover {
+    background-color: var(--bg-primary);
+    color: var(--text-primary);
+  }
+
+  .tab:focus {
+    outline: 1px solid var(--accent-primary);
+    outline-offset: -1px;
+  }
+
+  .tab.active {
+    background-color: var(--bg-terminal);
+    color: var(--text-primary);
+    border-bottom: 2px solid var(--accent-primary);
+    margin-bottom: -1px;
+  }
+
+  .tab-name {
+    display: flex;
+    align-items: center;
+    gap: 2px;
+  }
+
+  .dirty-indicator {
+    color: var(--accent-primary);
+    font-weight: bold;
+  }
+
+  .close-button {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    padding: 2px;
+    background: transparent;
+    border: none;
+    color: var(--text-secondary);
+    cursor: pointer;
+    border-radius: 4px;
+    opacity: 0;
+    transition: all 0.15s ease;
+  }
+
+  .tab:hover .close-button,
+  .tab.active .close-button {
+    opacity: 1;
+  }
+
+  .close-button:hover {
+    background-color: var(--bg-secondary);
+    color: var(--text-primary);
+  }
+
+  .tab.dirty .close-button {
+    opacity: 1;
+  }
+</style>

src/lib/components/editor/FileBrowser.svelte

@@ -0,0 +1,151 @@
+<script lang="ts">
+  import { editorStore } from "$lib/stores/editor";
+  import FileTreeItem from "./FileTreeItem.svelte";
+
+  const fileTree = editorStore.fileTree;
+  const isLoadingTree = editorStore.isLoadingTree;
+  const currentDirectory = editorStore.currentDirectory;
+
+  function handleRefresh() {
+    const dir = $currentDirectory;
+    if (dir) {
+      editorStore.initializeFileTree(dir);
+    }
+  }
+</script>
+
+<div class="file-browser">
+  <div class="header">
+    <span class="title">Files</span>
+    <button class="refresh-button" on:click={handleRefresh} title="Refresh file tree">
+      <svg
+        width="14"
+        height="14"
+        viewBox="0 0 24 24"
+        fill="none"
+        stroke="currentColor"
+        stroke-width="2"
+      >
+        <path d="M23 4v6h-6" />
+        <path d="M1 20v-6h6" />
+        <path d="M3.51 9a9 9 0 0 1 14.85-3.36L23 10M1 14l4.64 4.36A9 9 0 0 0 20.49 15" />
+      </svg>
+    </button>
+  </div>
+
+  <div class="tree-container">
+    {#if $isLoadingTree}
+      <div class="loading">
+        <svg
+          class="spinner"
+          width="20"
+          height="20"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          stroke-width="2"
+        >
+          <circle cx="12" cy="12" r="10" stroke-dasharray="32" stroke-dashoffset="32">
+            <animate
+              attributeName="stroke-dashoffset"
+              dur="1s"
+              values="32;0"
+              repeatCount="indefinite"
+            />
+          </circle>
+        </svg>
+        <span>Loading...</span>
+      </div>
+    {:else if $fileTree.length === 0}
+      <div class="empty">
+        <span>No files found</span>
+      </div>
+    {:else}
+      <div class="tree">
+        {#each $fileTree as entry (entry.path)}
+          <FileTreeItem {entry} />
+        {/each}
+      </div>
+    {/if}
+  </div>
+</div>
+
+<style>
+  .file-browser {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+    background-color: var(--bg-primary);
+    border-right: 1px solid var(--border-color);
+  }
+
+  .header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 8px 12px;
+    border-bottom: 1px solid var(--border-color);
+    background-color: var(--bg-secondary);
+  }
+
+  .title {
+    font-size: 12px;
+    font-weight: 600;
+    text-transform: uppercase;
+    color: var(--text-secondary);
+    letter-spacing: 0.5px;
+  }
+
+  .refresh-button {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    padding: 4px;
+    background: transparent;
+    border: none;
+    color: var(--text-secondary);
+    cursor: pointer;
+    border-radius: 4px;
+    transition: all 0.15s ease;
+  }
+
+  .refresh-button:hover {
+    background-color: var(--bg-primary);
+    color: var(--text-primary);
+  }
+
+  .tree-container {
+    flex: 1;
+    overflow-y: auto;
+    padding: 4px 0;
+  }
+
+  .tree {
+    min-width: max-content;
+  }
+
+  .loading,
+  .empty {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    gap: 8px;
+    padding: 24px;
+    color: var(--text-secondary);
+    font-size: 13px;
+  }
+
+  .spinner {
+    animation: spin 1s linear infinite;
+  }
+
+  @keyframes spin {
+    from {
+      transform: rotate(0deg);
+    }
+    to {
+      transform: rotate(360deg);
+    }
+  }
+</style>

src/lib/components/editor/FileTreeItem.svelte

@@ -0,0 +1,195 @@
+<script lang="ts">
+  import type { FileEntry } from "$lib/types/editor";
+  import { editorStore } from "$lib/stores/editor";
+
+  export let entry: FileEntry;
+  export let depth: number = 0;
+
+  function handleClick() {
+    if (entry.isDirectory) {
+      editorStore.toggleDirectory(entry);
+    } else {
+      editorStore.openFile(entry.path);
+    }
+  }
+
+  function handleKeydown(event: KeyboardEvent) {
+    if (event.key === "Enter" || event.key === " ") {
+      event.preventDefault();
+      handleClick();
+    }
+  }
+
+  $: isExpanded = entry.isExpanded ?? false;
+  $: isLoading = entry.isLoading ?? false;
+  $: children = entry.children ?? [];
+</script>
+
+<div class="file-tree-item">
+  <button
+    class="item-row"
+    class:directory={entry.isDirectory}
+    class:file={!entry.isDirectory}
+    style="padding-left: {depth * 16 + 8}px"
+    on:click={handleClick}
+    on:keydown={handleKeydown}
+    title={entry.path}
+  >
+    {#if entry.isDirectory}
+      <span class="icon">
+        {#if isLoading}
+          <svg
+            class="spinner"
+            width="14"
+            height="14"
+            viewBox="0 0 24 24"
+            fill="none"
+            stroke="currentColor"
+            stroke-width="2"
+          >
+            <circle cx="12" cy="12" r="10" stroke-dasharray="32" stroke-dashoffset="32">
+              <animate
+                attributeName="stroke-dashoffset"
+                dur="1s"
+                values="32;0"
+                repeatCount="indefinite"
+              />
+            </circle>
+          </svg>
+        {:else if isExpanded}
+          <svg
+            width="14"
+            height="14"
+            viewBox="0 0 24 24"
+            fill="none"
+            stroke="currentColor"
+            stroke-width="2"
+          >
+            <path d="M6 9l6 6 6-6" />
+          </svg>
+        {:else}
+          <svg
+            width="14"
+            height="14"
+            viewBox="0 0 24 24"
+            fill="none"
+            stroke="currentColor"
+            stroke-width="2"
+          >
+            <path d="M9 6l6 6-6 6" />
+          </svg>
+        {/if}
+      </span>
+      <span class="folder-icon">
+        <svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor">
+          <path
+            d="M10 4H4c-1.1 0-2 .9-2 2v12c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V8c0-1.1-.9-2-2-2h-8l-2-2z"
+          />
+        </svg>
+      </span>
+    {:else}
+      <span class="icon spacer"></span>
+      <span class="file-icon">
+        <svg
+          width="14"
+          height="14"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          stroke-width="2"
+        >
+          <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z" />
+          <polyline points="14 2 14 8 20 8" />
+        </svg>
+      </span>
+    {/if}
+    <span class="name">{entry.name}</span>
+  </button>
+
+  {#if entry.isDirectory && isExpanded && children.length > 0}
+    <div class="children">
+      {#each children as child (child.path)}
+        <svelte:self entry={child} depth={depth + 1} />
+      {/each}
+    </div>
+  {/if}
+</div>
+
+<style>
+  .file-tree-item {
+    user-select: none;
+  }
+
+  .item-row {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+    width: 100%;
+    padding: 4px 8px;
+    background: transparent;
+    border: none;
+    color: var(--text-primary);
+    font-size: 13px;
+    cursor: pointer;
+    text-align: left;
+    border-radius: 4px;
+    transition: background-color 0.15s ease;
+  }
+
+  .item-row:hover {
+    background-color: var(--bg-secondary);
+  }
+
+  .item-row:focus {
+    outline: 1px solid var(--accent-primary);
+    outline-offset: -1px;
+  }
+
+  .icon {
+    flex-shrink: 0;
+    width: 14px;
+    height: 14px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    color: var(--text-secondary);
+  }
+
+  .icon.spacer {
+    visibility: hidden;
+  }
+
+  .folder-icon {
+    flex-shrink: 0;
+    color: var(--accent-primary);
+  }
+
+  .file-icon {
+    flex-shrink: 0;
+    color: var(--text-secondary);
+  }
+
+  .name {
+    flex: 1;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+
+  .children {
+    margin-left: 0;
+  }
+
+  .spinner {
+    animation: spin 1s linear infinite;
+  }
+
+  @keyframes spin {
+    from {
+      transform: rotate(0deg);
+    }
+    to {
+      transform: rotate(360deg);
+    }
+  }
+</style>

src/lib/stores/editor.ts

@@ -0,0 +1,285 @@
+import { writable, derived, get } from "svelte/store";
+import { invoke } from "@tauri-apps/api/core";
+import type { EditorState, EditorTab, FileEntry } from "$lib/types/editor";
+
+const defaultState: EditorState = {
+  tabs: [],
+  activeTabId: null,
+  isFileBrowserOpen: true,
+  currentDirectory: "",
+  fileTree: [],
+  isLoadingTree: false,
+};
+
+function getLanguageFromPath(filePath: string): string {
+  const ext = filePath.split(".").pop()?.toLowerCase() || "";
+  const languageMap: Record<string, string> = {
+    js: "javascript",
+    jsx: "javascript",
+    ts: "typescript",
+    tsx: "typescript",
+    py: "python",
+    rs: "rust",
+    go: "go",
+    java: "java",
+    c: "c",
+    cpp: "cpp",
+    h: "c",
+    hpp: "cpp",
+    cs: "csharp",
+    rb: "ruby",
+    php: "php",
+    swift: "swift",
+    kt: "kotlin",
+    scala: "scala",
+    html: "html",
+    htm: "html",
+    css: "css",
+    scss: "scss",
+    sass: "sass",
+    less: "less",
+    json: "json",
+    xml: "xml",
+    yaml: "yaml",
+    yml: "yaml",
+    toml: "toml",
+    md: "markdown",
+    markdown: "markdown",
+    sql: "sql",
+    sh: "shell",
+    bash: "shell",
+    zsh: "shell",
+    ps1: "powershell",
+    dockerfile: "dockerfile",
+    svelte: "svelte",
+    vue: "vue",
+    graphql: "graphql",
+    gql: "graphql",
+    lua: "lua",
+    r: "r",
+    dart: "dart",
+    elm: "elm",
+    ex: "elixir",
+    exs: "elixir",
+    erl: "erlang",
+    hs: "haskell",
+    clj: "clojure",
+    lisp: "lisp",
+    ml: "ocaml",
+    fs: "fsharp",
+    zig: "zig",
+    nim: "nim",
+    v: "v",
+    wasm: "wasm",
+    wat: "wasm",
+  };
+  return languageMap[ext] || "plaintext";
+}
+
+function generateTabId(): string {
+  return `tab-${Date.now()}-${Math.random().toString(36).substring(2, 9)}`;
+}
+
+function createEditorStore() {
+  const state = writable<EditorState>(defaultState);
+  const isEditorVisible = writable<boolean>(false);
+  const saveError = writable<string | null>(null);
+
+  async function loadDirectory(dirPath: string): Promise<FileEntry[]> {
+    try {
+      const entries = await invoke<FileEntry[]>("list_directory", { path: dirPath });
+      return entries.sort((a, b) => {
+        if (a.isDirectory && !b.isDirectory) return -1;
+        if (!a.isDirectory && b.isDirectory) return 1;
+        return a.name.localeCompare(b.name);
+      });
+    } catch (error) {
+      console.error("Failed to load directory:", error);
+      return [];
+    }
+  }
+
+  async function initializeFileTree(rootPath: string) {
+    state.update((s) => ({ ...s, isLoadingTree: true, currentDirectory: rootPath }));
+    try {
+      const entries = await loadDirectory(rootPath);
+      state.update((s) => ({ ...s, fileTree: entries, isLoadingTree: false }));
+    } catch (error) {
+      console.error("Failed to initialize file tree:", error);
+      state.update((s) => ({ ...s, isLoadingTree: false }));
+    }
+  }
+
+  async function toggleDirectory(entry: FileEntry) {
+    if (!entry.isDirectory) return;
+
+    state.update((s) => {
+      const updateTree = (entries: FileEntry[]): FileEntry[] => {
+        return entries.map((e) => {
+          if (e.path === entry.path) {
+            return { ...e, isExpanded: !e.isExpanded, isLoading: !e.isExpanded && !e.children };
+          }
+          if (e.children) {
+            return { ...e, children: updateTree(e.children) };
+          }
+          return e;
+        });
+      };
+      return { ...s, fileTree: updateTree(s.fileTree) };
+    });
+
+    if (!entry.isExpanded && !entry.children) {
+      const children = await loadDirectory(entry.path);
+      state.update((s) => {
+        const updateTree = (entries: FileEntry[]): FileEntry[] => {
+          return entries.map((e) => {
+            if (e.path === entry.path) {
+              return { ...e, children, isLoading: false };
+            }
+            if (e.children) {
+              return { ...e, children: updateTree(e.children) };
+            }
+            return e;
+          });
+        };
+        return { ...s, fileTree: updateTree(s.fileTree) };
+      });
+    }
+  }
+
+  async function openFile(filePath: string) {
+    const currentState = get(state);
+
+    const existingTab = currentState.tabs.find((t) => t.filePath === filePath);
+    if (existingTab) {
+      state.update((s) => ({ ...s, activeTabId: existingTab.id }));
+      return;
+    }
+
+    try {
+      const content = await invoke<string>("read_file_content", { path: filePath });
+      const fileName = filePath.split(/[/\\]/).pop() || "untitled";
+      const language = getLanguageFromPath(filePath);
+      const newTab: EditorTab = {
+        id: generateTabId(),
+        filePath,
+        fileName,
+        content,
+        originalContent: content,
+        isDirty: false,
+        language,
+      };
+
+      state.update((s) => ({
+        ...s,
+        tabs: [...s.tabs, newTab],
+        activeTabId: newTab.id,
+      }));
+    } catch (error) {
+      console.error("Failed to open file:", error);
+      saveError.set(`Failed to open file: ${error}`);
+    }
+  }
+
+  async function saveFile(tabId?: string) {
+    const currentState = get(state);
+    const tab = tabId
+      ? currentState.tabs.find((t) => t.id === tabId)
+      : currentState.tabs.find((t) => t.id === currentState.activeTabId);
+
+    if (!tab) return;
+
+    saveError.set(null);
+    try {
+      await invoke("write_file_content", { path: tab.filePath, content: tab.content });
+      state.update((s) => ({
+        ...s,
+        tabs: s.tabs.map((t) =>
+          t.id === tab.id ? { ...t, originalContent: t.content, isDirty: false } : t
+        ),
+      }));
+    } catch (error) {
+      console.error("Failed to save file:", error);
+      saveError.set(`Failed to save file: ${error}`);
+      throw error;
+    }
+  }
+
+  function updateTabContent(tabId: string, content: string) {
+    state.update((s) => ({
+      ...s,
+      tabs: s.tabs.map((t) =>
+        t.id === tabId ? { ...t, content, isDirty: content !== t.originalContent } : t
+      ),
+    }));
+  }
+
+  function closeTab(tabId: string) {
+    state.update((s) => {
+      const tabIndex = s.tabs.findIndex((t) => t.id === tabId);
+      const newTabs = s.tabs.filter((t) => t.id !== tabId);
+
+      let newActiveId = s.activeTabId;
+      if (s.activeTabId === tabId) {
+        if (newTabs.length === 0) {
+          newActiveId = null;
+        } else if (tabIndex >= newTabs.length) {
+          newActiveId = newTabs[newTabs.length - 1].id;
+        } else {
+          newActiveId = newTabs[tabIndex].id;
+        }
+      }
+
+      return { ...s, tabs: newTabs, activeTabId: newActiveId };
+    });
+  }
+
+  function setActiveTab(tabId: string) {
+    state.update((s) => ({ ...s, activeTabId: tabId }));
+  }
+
+  function toggleFileBrowser() {
+    state.update((s) => ({ ...s, isFileBrowserOpen: !s.isFileBrowserOpen }));
+  }
+
+  function toggleEditor() {
+    isEditorVisible.update((v) => !v);
+  }
+
+  function showEditor() {
+    isEditorVisible.set(true);
+  }
+
+  function hideEditor() {
+    isEditorVisible.set(false);
+  }
+
+  return {
+    state: { subscribe: state.subscribe },
+    isEditorVisible: { subscribe: isEditorVisible.subscribe },
+    saveError: { subscribe: saveError.subscribe },
+
+    initializeFileTree,
+    toggleDirectory,
+    openFile,
+    saveFile,
+    updateTabContent,
+    closeTab,
+    setActiveTab,
+    toggleFileBrowser,
+    toggleEditor,
+    showEditor,
+    hideEditor,
+
+    tabs: derived(state, ($state) => $state.tabs),
+    activeTab: derived(state, ($state) => $state.tabs.find((t) => t.id === $state.activeTabId)),
+    activeTabId: derived(state, ($state) => $state.activeTabId),
+    fileTree: derived(state, ($state) => $state.fileTree),
+    isFileBrowserOpen: derived(state, ($state) => $state.isFileBrowserOpen),
+    isLoadingTree: derived(state, ($state) => $state.isLoadingTree),
+    currentDirectory: derived(state, ($state) => $state.currentDirectory),
+    hasDirtyTabs: derived(state, ($state) => $state.tabs.some((t) => t.isDirty)),
+  };
+}
+
+export const editorStore = createEditorStore();

src/lib/types/editor.ts

@@ -0,0 +1,27 @@
+export interface FileEntry {
+  name: string;
+  path: string;
+  isDirectory: boolean;
+  isExpanded?: boolean;
+  children?: FileEntry[];
+  isLoading?: boolean;
+}
+
+export interface EditorTab {
+  id: string;
+  filePath: string;
+  fileName: string;
+  content: string;
+  originalContent: string;
+  isDirty: boolean;
+  language: string;
+}
+
+export interface EditorState {
+  tabs: EditorTab[];
+  activeTabId: string | null;
+  isFileBrowserOpen: boolean;
+  currentDirectory: string;
+  fileTree: FileEntry[];
+  isLoadingTree: boolean;
+}

src/routes/+page.svelte

@@ -7,6 +7,7 @@
   import { initNotificationSync, cleanupNotificationSync } from "$lib/stores/notifications";
   import { conversationsStore } from "$lib/stores/conversations";
   import { claudeStore, isClaudeProcessing } from "$lib/stores/claude";
+  import { editorStore } from "$lib/stores/editor";
   import { getCurrentWindow, LogicalSize } from "@tauri-apps/api/window";
   import "$lib/notifications/testNotifications";
   import Terminal from "$lib/components/Terminal.svelte";
@@ -14,6 +15,7 @@
   import StatusBar from "$lib/components/StatusBar.svelte";
   import AnimeGirl from "$lib/components/AnimeGirl.svelte";
   import CompactMode from "$lib/components/CompactMode.svelte";
+  import EditorPanel from "$lib/components/editor/EditorPanel.svelte";
   import { characterState } from "$lib/stores/character";
   import type { CharacterState } from "$lib/types/states";
   import PermissionModal from "$lib/components/PermissionModal.svelte";
@@ -29,6 +31,32 @@
   let currentCharacterState: CharacterState = $state("idle");
   let compactModeActive = $state(false);
 
+  // Editor state
+  const isEditorVisible = editorStore.isEditorVisible;
+  let lastInitializedCwd = "";
+
+  // Track connection status and CWD for the editor
+  const connectionStatus = claudeStore.connectionStatus;
+  const currentWorkingDirectory = claudeStore.currentWorkingDirectory;
+
+  // Initialize/update editor file tree when CWD changes while editor is visible
+  $effect(() => {
+    const visible = $isEditorVisible;
+    const cwd = $currentWorkingDirectory;
+    const connected = $connectionStatus === "connected";
+
+    // Only initialize when editor is visible, connected, and CWD is set
+    if (visible && connected && cwd && cwd !== lastInitializedCwd) {
+      lastInitializedCwd = cwd;
+      editorStore.initializeFileTree(cwd);
+    }
+
+    // Hide editor if disconnected
+    if (!connected && visible) {
+      editorStore.hideEditor();
+    }
+  });
+
   // Window size constants
   const COMPACT_WIDTH = 280;
   const COMPACT_HEIGHT = 400;
@@ -176,6 +204,40 @@
       toggleCompactMode();
       return;
     }
+
+    // Ctrl+E - Toggle editor panel (only when connected)
+    if (event.ctrlKey && event.key === "e") {
+      event.preventDefault();
+      // Only allow opening the editor when connected
+      if (get(claudeStore.connectionStatus) === "connected") {
+        editorStore.toggleEditor();
+      }
+      return;
+    }
+
+    // Ctrl+B - Toggle file browser (when editor is visible)
+    if (event.ctrlKey && event.key === "b" && get(editorStore.isEditorVisible)) {
+      event.preventDefault();
+      editorStore.toggleFileBrowser();
+      return;
+    }
+
+    // Ctrl+S - Save current file (when editor is visible)
+    if (event.ctrlKey && event.key === "s" && get(editorStore.isEditorVisible)) {
+      event.preventDefault();
+      editorStore.saveFile();
+      return;
+    }
+
+    // Ctrl+W - Close current tab (when editor is visible)
+    if (event.ctrlKey && event.key === "w" && get(editorStore.isEditorVisible)) {
+      event.preventDefault();
+      const activeTabId = get(editorStore.activeTabId);
+      if (activeTabId) {
+        editorStore.closeTab(activeTabId);
+      }
+      return;
+    }
   }
 
   async function handleInterrupt() {
@@ -330,10 +392,14 @@
         onmousedown={startResize}
       ></div>
 
-      <!-- Right panel: Terminal and input -->
+      <!-- Right panel: Terminal/Editor and input -->
       <div class="terminal-panel flex-1 flex flex-col min-w-0">
-        <Terminal />
+        {#if $isEditorVisible}
-        <InputBar />
+          <EditorPanel />
+        {:else}
+          <Terminal />
+          <InputBar />
+        {/if}
       </div>
     </main>