Release v1.01 Enhanced: Vi Control, TUI Gen5, Core Stability

Documentation/implementation_plan_responsive.md

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+# Responsive Layout Hardening Plan
+
+## Goal
+Fix "eaten/overlapped" text by enforcing strict horizontal boundaries and increasing safety margins for the TUI renderer.
+
+## User Review Required
+> [!NOTE]
+> This change will slightly narrow the text area (by ~2 chars) to ensure borders never cut off content.
+
+## Proposed Changes
+
+### 1. `ViewportMessage` Hardening
+- **File**: `bin/opencode-ink.mjs`
+- **Change**: Pass `width - 6` to Markdown children (User/AI).
+- **Reason**: Accounts for Border (2) + Padding (2) + Safe Margin (2).
+- **Style**: Add `overflow: 'hidden'` to the bubble container.
+
+### 2. `ThinkingBlock` Constraints
+- **File**: `bin/ui/components/ThinkingBlock.mjs`
+- **Change**: Ensure it accepts `width` prop and passes `width - 4` to internal text.
+
+### 3. `ScrollableChat` Verification
+- **File**: `bin/opencode-ink.mjs`
+- **Action**: Verify `ScrollableChat` container clips overflow correctly.
+
+## Verification Plan
+1.  **Resize Test**: Drag terminal window to different sizes.
+2.  **Long Line Test**: Genrate a long path (`/a/very/long/path/...`). Verify it wraps or truncates, doesn't explode layout.