chore: CLI v2.1.75–v2.1.80 audit and support (#223–#232) (#233)

## Summary

This PR implements all tickets filed from the CLI v2.1.74 → v2.1.80 changelog audit (issues #223–#232).

### Changes by Issue

- **#223** — `feat: handle Elicitation and ElicitationResult hook events`
  New `ElicitationModal.svelte` component, Rust parsing for `[Elicitation Hook]` and `[ElicitationResult Hook]`, new store methods, and TypeScript event types.

- **#224** — `feat: handle StopFailure hook event for API error turns`
  Rust parsing for `[StopFailure Hook]`; frontend shows error toast + error character state.

- **#225** — `feat: handle PostCompact hook event`
  Rust parsing for `[PostCompact Hook]`; frontend shows info toast + success character state.

- **#226** — `feat: expose --name CLI flag as session name at startup`
  Added `session_name` field to `ClaudeStartOptions`; `StatusBar.doConnect()` passes the conversation name.

- **#227** — `fix: tighten startup watchdog and correct misleading comment`
  Startup watchdog tightened from 60 s → 30 s; corrected a comment that said "5 minutes" whilst the code used 60 seconds.

- **#228** — `fix: document cost estimation review and update default model fallback`
  Default model fallback updated from `claude-sonnet-4-5-20250929` → `claude-sonnet-4-6`; added doc comment explaining why char-based estimation is unaffected by v2.1.75 token overcounting fix.

- **#229** — `chore: update supported CLI version constant to 2.1.80`
  `SUPPORTED_CLI_VERSION` bumped in `CliVersion.svelte`.

- **#230** — `feat: surface memory file last-modified timestamps in MemoryBrowserPanel`
  Backend populates `last_modified` Unix timestamp; frontend formats and displays it per file.

- **#231** — `feat: update max_output_tokens upper bound and helper text for 128k`
  Input max raised to 128 000; placeholder and helper text updated to reflect model-dependent defaults and 128 k ceiling for Opus/Sonnet 4.6.

- **#232** — `fix: document non-streaming fallback compatibility with mid-session watchdog`
  Added doc comment above `STUCK_TIMEOUT` explaining the 5-minute watchdog is intentionally larger than the CLI's 2-minute non-streaming API fallback.

---

✨ This PR was created with help from Hikari~ 🌸

Reviewed-on: #233
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

src-tauri/src/commands.rs

@@ -1464,6 +1464,7 @@ pub async fn close_application(app_handle: AppHandle) -> Result<(), String> {
 pub struct MemoryFileInfo {
     pub path: String,
     pub heading: Option<String>,
+    pub last_modified: Option<String>, // Unix timestamp in seconds as a string
 }
 
 #[derive(serde::Serialize)]
@@ -1535,7 +1536,11 @@ async fn list_memory_files_via_wsl() -> Result<MemoryFilesResponse, String> {
     let mut files = Vec::new();
     for path in paths {
         let heading = read_wsl_file_first_heading(&path);
-        files.push(MemoryFileInfo { path, heading });
+        files.push(MemoryFileInfo {
+            path,
+            heading,
+            last_modified: None,
+        });
     }
 
     Ok(MemoryFilesResponse { files })
@@ -1605,14 +1610,23 @@ async fn list_memory_files_native() -> Result<MemoryFilesResponse, String> {
     // Sort files alphabetically
     memory_paths.sort();
 
-    // Read first heading from each file
+    // Read first heading and modification time from each file
     let files = memory_paths
         .into_iter()
         .map(|path| {
             let heading = fs::read_to_string(&path)
                 .ok()
                 .and_then(|content| extract_first_heading(&content));
-            MemoryFileInfo { path, heading }
+            let last_modified = fs::metadata(&path)
+                .ok()
+                .and_then(|m| m.modified().ok())
+                .and_then(|t| t.duration_since(std::time::UNIX_EPOCH).ok())
+                .map(|d| d.as_secs().to_string());
+            MemoryFileInfo {
+                path,
+                heading,
+                last_modified,
+            }
         })
         .collect();