feat: multiple UI improvements, font settings, and memory file display names (#175)

## Summary

- **fix**: `show_thinking_blocks` setting now persists across sessions — it was defined on the TypeScript side but missing from the Rust `HikariConfig` struct, so serde silently dropped it on every save/load
- **feat**: Tool calls are now rendered as collapsible blocks matching the Extended Thinking block aesthetic, replacing the old inline dropdown approach
- **feat**: Add configurable max output tokens setting
- **feat**: Use random creative names for conversation tabs
- **test**: Significantly expanded frontend unit test coverage
- **docs**: Require tests for all changes in CLAUDE.md
- **feat**: Allow users to specify a custom terminal font (Closes #176)
- **feat**: Display friendly names for memory files derived from the first heading (Closes #177)
- **feat**: Add custom UI font support for the app chrome (buttons, labels, tabs)
- **fix**: Apply custom UI font to the full app interface — `.app-container` was hardcoded, blocking inheritance from `body`; also renamed "Custom Font" to "Custom Terminal Font" for clarity

✨ This PR was created with help from Hikari~ 🌸

Reviewed-on: #175
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

src/lib/components/CliVersion.test.ts

@@ -0,0 +1,134 @@
+/**
+ * CliVersion Component Tests
+ *
+ * Tests the version comparison logic used by the CliVersion component,
+ * which compares the installed CLI version against the supported version.
+ *
+ * What this component does:
+ * - Displays the installed Claude CLI version
+ * - Displays the highest audited/supported CLI version
+ * - Shows a warning when the installed version is ahead of or behind supported
+ *
+ * Manual testing checklist:
+ * - [ ] Installed version is fetched and displayed on mount
+ * - [ ] "current" badge shows in green when versions match
+ * - [ ] "ahead" badge shows in amber when installed is newer than supported
+ * - [ ] "behind" badge shows in red when installed is older than supported
+ * - [ ] Warning message appears for "ahead" and "behind" states
+ */
+
+import { describe, it, expect } from "vitest";
+
+const SUPPORTED_CLI_VERSION = "2.1.53";
+
+function compareVersions(a: string, b: string): number {
+  const aParts = a.split(".").map(Number);
+  const bParts = b.split(".").map(Number);
+  for (let i = 0; i < Math.max(aParts.length, bParts.length); i++) {
+    const aVal = aParts[i] ?? 0;
+    const bVal = bParts[i] ?? 0;
+    if (aVal > bVal) return 1;
+    if (aVal < bVal) return -1;
+  }
+  return 0;
+}
+
+// ---
+
+describe("SUPPORTED_CLI_VERSION", () => {
+  it("is defined and non-empty", () => {
+    expect(SUPPORTED_CLI_VERSION).toBeTruthy();
+  });
+
+  it("matches the expected audited version", () => {
+    expect(SUPPORTED_CLI_VERSION).toBe("2.1.53");
+  });
+});
+
+describe("compareVersions", () => {
+  describe("equal versions", () => {
+    it("returns 0 for identical versions", () => {
+      expect(compareVersions("1.0.0", "1.0.0")).toBe(0);
+    });
+
+    it("returns 0 for the supported CLI version against itself", () => {
+      expect(compareVersions(SUPPORTED_CLI_VERSION, SUPPORTED_CLI_VERSION)).toBe(0);
+    });
+
+    it("returns 0 for 0.0.0 vs 0.0.0", () => {
+      expect(compareVersions("0.0.0", "0.0.0")).toBe(0);
+    });
+  });
+
+  describe("major version differences", () => {
+    it("returns 1 when a has a higher major version", () => {
+      expect(compareVersions("2.0.0", "1.0.0")).toBe(1);
+    });
+
+    it("returns -1 when a has a lower major version", () => {
+      expect(compareVersions("1.0.0", "2.0.0")).toBe(-1);
+    });
+  });
+
+  describe("minor version differences", () => {
+    it("returns 1 when a has a higher minor version", () => {
+      expect(compareVersions("1.2.0", "1.1.0")).toBe(1);
+    });
+
+    it("returns -1 when a has a lower minor version", () => {
+      expect(compareVersions("1.1.0", "1.2.0")).toBe(-1);
+    });
+  });
+
+  describe("patch version differences", () => {
+    it("returns 1 when a has a higher patch version", () => {
+      expect(compareVersions("1.0.2", "1.0.1")).toBe(1);
+    });
+
+    it("returns -1 when a has a lower patch version", () => {
+      expect(compareVersions("1.0.1", "1.0.2")).toBe(-1);
+    });
+  });
+
+  describe("major version takes precedence", () => {
+    it("returns 1 when a has a higher major but lower minor", () => {
+      expect(compareVersions("2.0.0", "1.9.9")).toBe(1);
+    });
+
+    it("returns -1 when a has a lower major but higher minor", () => {
+      expect(compareVersions("1.9.9", "2.0.0")).toBe(-1);
+    });
+  });
+
+  describe("unequal segment counts", () => {
+    it("treats missing segments as 0 (a shorter than b)", () => {
+      expect(compareVersions("1.0", "1.0.0")).toBe(0);
+    });
+
+    it("treats missing segments as 0 (a longer than b)", () => {
+      expect(compareVersions("1.0.0", "1.0")).toBe(0);
+    });
+
+    it("correctly compares when a has an extra non-zero segment", () => {
+      expect(compareVersions("1.0.1", "1.0")).toBe(1);
+    });
+
+    it("correctly compares when b has an extra non-zero segment", () => {
+      expect(compareVersions("1.0", "1.0.1")).toBe(-1);
+    });
+  });
+
+  describe("supported CLI version comparisons", () => {
+    it("returns 1 for a version ahead of supported", () => {
+      expect(compareVersions("2.2.0", SUPPORTED_CLI_VERSION)).toBe(1);
+    });
+
+    it("returns -1 for a version behind supported", () => {
+      expect(compareVersions("2.1.0", SUPPORTED_CLI_VERSION)).toBe(-1);
+    });
+
+    it("returns 0 for exactly the supported version", () => {
+      expect(compareVersions("2.1.53", SUPPORTED_CLI_VERSION)).toBe(0);
+    });
+  });
+});